Bending brake



0 il 8@ 2 A l m .9 .m1 mmm mmm l u MWJ ED BE L n 2 9 un am. 2 n ,a WU

2 SHEETS-SHEET l Zi7w6m57 2 sHEETs-sHEET 2 N. KRUMP.

Jan. 23, w23.

BENDlNs BRAKE v FILED JULY 2l, 1920.

Patented dan. Z3, 1923.

PATENTI NIC KRUMP, 0F CHICAGO, ILLINOIS.

l BENDING BRAKE.

Application led July 21,

T0 all whom t may conce/m:

Be it known that I, NIC KRUMP, a citizen of the United States, and a resident of Chicago; in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bending Brakes, of which the following, reference being had to the drawings accompanying and forming a part hereof, is a specification.

This invention relates to bending brakes by means of which sheet metal of considerable thickness is bent or folded. y Among the objects of the invention are to lessen the number of parts and the cost of a bending brake having determined strength and rigidity; to obtain a brake of the kind named which is durable, not liable to get out of order or to become broken, and not liable to get out of adjustment; to obtain a brake by means of which accurate work may be done when a numberof duplicate bends are to vbe made, and a brake which is easily understood and operated by men skilled in the art of bending sheet and bar metal.

In the drawingsreferred to and illustratinothe invention Figure l is a front elevation of a. bending brake;

Fig. 2 is an end elevation; and

Fig. 3 is a vertical section on line 3--3 of Fig. l, viewed as indicated by arrows.

AA reference character applied to designate `a given part indicates said part throughout the several figures-of the drawing, wherever the same appears.

A, A1 and B, B1, represent the standards or legs of the brake, a, a represent diagonally extending braces, and b, b, base members. Said legs, braces and base `members are rigidly secured together by rivets C, C.

The bed of the brake is supported by the frame formed by standards A, A1, B, B1, braces a, a, and base members and comprises the channel iron D, (consisting of web o, and parallel flanges d1, al?) the chan nel iron E, (consisting of web e and parallel ianges e1, e2) and end members D1, D1. End members D-, D1 are respectively provided with a ange D2, on which the ends of web d of channel iron D rests, and to which said web is rigidly secured by rivets D1, D3. Flange d1 of channel iron D is rigidly secured to standard or leg B1, by rivets d3, d1. The web e of channel iron E is rigidly secured to standards A, A1, and to flange d2 of channel iron D, by rivets e3, e3. Flange e2 of 1920. Serial No. 398,003.

channel iron E forms the lower jaw of the brake.

E1, E1 represent adjustable members which are mounted on heads D1, adjusted by means of bolt E2, andsecured in adjusted position by bolts E3, E3.

The upper jaw of the brake comprises members F, G and H. Member F consists of channel iron having the central web f, and flanges f1, f2. The web f is provided with a curving bend, as at f3, Fig. 3, so that the flange f2 is in a horizontal plane, the portion of web f adjacent thereto is in a vertical plane, and the flange f1 is in a vertical plane,

with the portion of web fbetween said flange f1 and said curved bend f3 in a horizontal plane. (See Fig. 3.)

The members G, G, respectively consist of a head provided with a horizontal rib or flange g and an inclined rib or flange g1; and also provided with a fulcrum (G1) which is extended into slot G2 in adjustable member E1 on. head D1 at each end of the brake.

The plate H and channel iron F are rigidly secured together by rivets 7L, 71 said rivets extending through the curved portion or bend f3 of web f. Heads G, G, are secured to the ends of channel iron F by rivets g1, g2 which extend through said web f and through the ribs g, g; andplate H is secured to ribs g1, g1 by rivets g3, g3 which extend therethrough and through said plate.

I represents a steel plate on the under side of the horizontal flange f2 of channel iron F, and is arranged to be forced down on to the sheet or bar of metal which is to be bent or folded by the brake, to hold said sheet or bar firmly in place by means of lever J, eccentric y' on pivot J1 and link K. K1 represents a pivot which is secured in head D1, and on which the lower end of link K is pivotally mounted. represents a stop to limit the movement of lever .I in its travel from the position in which it is ilhistrated in Fig. 2 tothe left as viewed The bending lea-f or apron of the brake comprises the heads L, L which are fulcrumed on pivots L1= L1 said pins being rigidly secured in heads D1, D1 plate M which is secured to heads L, L by rivets Z, Z and the steel plate N, which is curved as at n, and the edge thereof adjacent to said curve secured to the plate M by rivets m, m.

O, O represent sockets on the sides of heads L, L, O1, O1 represent rods, and O2, O2, counter weights on said rods.

Attention is called to the fact that the. lower edge of plate H is bevelled to .tit closely to the upper side of flange f2 of channel iron F, and that the rivets la, 71 which rigidly secure said plate to web of chau nel iron F, extend longitudinally on said plate adjacent to said bevelled edge.- rIhis construction is designed to give great rigidity to the edge I, of flange `when a plate, sheet, or bar of metal (as X, Fig. 3) is bent thereover by the turning of the bend ing leaf on its fulcrums L1, L1 from the position in which it is illustrated into a plane parallel to, or Vat an acute angle to, plate .l-l,

And also the plate N, bent or curved as at .n and rigidly secured to the plate M by rivets m, m which extend longitudinally along said plate lvl, N adjacent to the upper edges thereof, is designed to receive the thrust which is received .in the turning of the bending leaf as last above recited and the bending of a sheet or bar (as X) by said turning of said leaf.

The portion of plate N extends beyond the reverse bend n resisting, along with plate M, edge thrust on said plate M. to maintain said edge staight, that is, in a plane at right angles to the sides of" said plates.`

I claim z- 4 l. In a bending brake, the combination of standards, heads and a bed, all rigidly secured together, and an upper jaw adjustably mounted on said bed, said upper jaw comprising a channel iron having a longitudinally extending curved bend in the cental web thereof, to position a portion of said Web and one of its flanges in horizontal planes and a portion of said web and its remaining flange in vertical planes, in combination With Ya platel provided With .a bevelled lower edge arranged *to rest on the upper face of said horizontally` positioned flange, With the body of said plate adjacent to said curved bend and rigidly secured thereto. j

2.. In a bending brake, the combination of standards, heads and a bed all rigidly secured together, an upper jaw adjustably mounted on said bed, anda bending leaf pivot-ally mounted thereon, said bending leaf comprising plates, one thereof provided with a reverse bend to position the portions adjacent tol said bend in parallel planes. and said plates rigidly secured together by rivets extending longitudinally of said plates. v j

3. In a bending brake, standards, heads and a bed, all rigidly secured together, said bed comprising channel irons, the central. web` ofone thereof positioned in a vertical plane and its flanges in horizontal planes, and the central'yveb'ofthe other in a hori- Zontal plane and its flanges in vertical planes,v said vertical web and the vertical flange adjacent thereto rigidly secured together, in combination with an upper jaiv comprising a channel iron having a longitudinally extending curved bend in the central web thereof kto position a portion of said web and one of its flanges in horizontal planes and a portion of said web and its remaining flange in Vertical planes, and a plate provided with a bevelled lower edge arranged to rest on the upper face of said horizontally positioned flange, the body of said plate positioned adjacent to the bend of said central web and rigidly secured thereto.

4;. In a bending brake, standards arranged to support a bed member, said bed member comprising heads in combination with channel irons rigidly secured together by rivets extending through the central web of one and one of the parallel flanges of the other, and the ends of said channel irons rigidly secured to said standards, in combination With a bending leaf pivotally mounted on sail heads, saidbending leaf comprising plates, one thereof provided With a reverse bend to position the portions thereof adjacent tok said bend in parallel planes, and said plates rigidly secured together.

NIC KRUMP.

CHARLES TURNER BROWN. 

